Learning apps for 1-2 graders?

My kids like Prodigy Math. If your child is enrolled in an OUSD school, Prodigy can be accessed via the Clever App. To access all features, the membership is about $20 a month. 

Some parents think it is too gamified but our 2nd grader really loves playing Prodigy and it has advanced our kiddo's math skills greatly. I think it is a good game for kids who need to review concepts they are learning, or who can intuit math fairly easily and who are self-driven to advance. There aren't really lessons to learn new concepts (there is an option to view mini lessons but I don't think my kid has ever done that...nor would most kids choose to). Our kiddo is very motivated and sort of self-teaches and I try to keep an eye on the types of questions that are challenging and quickly review strategies offline (I do this once every few months or if I see there is a clear question type that has poor scores). There is a parent portal that provides data/progress by question type.  It lets you set grade level but it doesn't seem to easily allow you to adjust question categories (for example, maybe your school hasn't gone over how to tell time/read a clock face - you can't get ask the game to bypass those questions, the game will automatically feed them per its algorithm).  We do have a paid membership because our kid liked playing it a lot and sometimes plays online with friends. The game mechanics are not AngryBirds/CandyCrush-level stimulating. It is more like a world building game where you can design your own little room and "buy" costumes with  points you earn through gameplay.